User's Manual
15Manual Receiver GR-12+ 3xG Graupner HoTT 2. 4
5. FIRMWARE UPDATE - GRAUPNER 33575 / 33576 / 33577 HOTT RECEIVERS
Firmware updates are loaded into the receiver via the Channel 5 output, using a PC running Windows
XP, Vista or 7. You will also need the separately available USB interface, Order No. 7168.6 and the
adapter lead, Order No. 7168.6A or 7168.S (33575: additional adapter lead, Order No. 33565.1).
The programs and les required for this can be found in the Download area for the corresponding
products at www.graupner.de.
Connect the adapter lead to the USB interface, Order No. 7168.6. The
connectors are polarised: note the small chamfers on one side. Never
use force - the connectors should engage easily.
5.1 Receiver
GR-12+3xG HoTT receiver / (Order No. 33576 / 33577):
Connect the adapter lead to receiver channel 5 as shown in the picture.
The connectors are polarised: note the small chamfers on one side.
Never use force - the connectors should engage easily.
The black wire must be at the top (-), the orange wire at the bottom (T).
GR-12SH+3xG HoTT receiver (Order No. 33575): an additional adapter
lead, Order No. 33565.1 is also required.
5.2. Update procedure
Start “Slow yer/Gyro receiver update”
The “Slow yer/Gyro receiver update” program is best called up from the “Firmware_Upgrade_grStudio”
program. Click on the “Slow yer/Gyro receiver update” point under “Link” in the left-hand function menu
(alternatively select the appropriate entry “Micro Receiver Upgrade” under “Menu”).
It is also possible to start the associated application program directly by double-clicking on the le
“micro_gyro_swloader.exe”. You will nd this .exe le in the “Graupner_PCSoftware” folder of the
“HoTT_Software VX” package.
A program window now appears in which you should rst set the “correct” COM port for the USB
interface, Order No. 7168.6, in the Select window.
If you are not sure of this, check the COM port in the “Select Port” window in the “Controller Menu”
(see above), and note down the COM port number at the “Silicon Labs CP210x USB to UART Bridge”
entry – in this case “COM03” (if you select the wrong port, you will be alerted to this when you read out
the receiver data). Click on xx in order to load the corresponding rmware le named “MicroStabi7X_V_
XX.bin” from the hard disc (“XX” stands for the version number.)